esint – Extended set of integrals for Computer Modern

The esint pack­age per­mits ac­cess to al­ter­nate in­te­gral sym­bols
when you're us­ing the Com­puter Modern fonts. In the orig­i­nal
set, sev­eral in­te­gral sym­bols are miss­ing, such as \oi­int. Many
of these sym­bols are avail­able in other font sets
(px­fonts,
tx­fonts, etc.), but there is no good
so­lu­tion if you want to use Com­puter Modern.